<template>
  <Layout :name="'仪器统计'">
    <div id="equipTotal"></div>
  </Layout>
</template>

<script lang="ts" setup>
  import 'echarts-gl';
  import { ref, onMounted } from "vue";
  import * as echarts from 'echarts';
  import Layout from '../layout.vue';
  import { getEquipData } from '@/api/pageApi';

  const equip = ref(0); // 在线仪器
  const unequip = ref(0); // 异常仪器

  // 图表配置
  let lineDom: HTMLElement | null = null;
  let charts: any = null;
  //3D饼图 - 1
  function init() {
    let boxHeight: number = 0;
    let legendData: any[] = [];
    let legendBfb = [];

    function getParametricEquation(startRatio, endRatio, isSelected, isHovered, k, h) {
      // 计算
      let midRatio = (startRatio + endRatio) / 2;
      let startRadian = startRatio * Math.PI * 2;
      let endRadian = endRatio * Math.PI * 2;
      let midRadian = midRatio * Math.PI * 2;
      // 如果只有一个扇形，则不实现选中效果。
      if (startRatio === 0 && endRatio === 1) {
        isSelected = false;
      }
      // 通过扇形内径/外径的值，换算出辅助参数 k（默认值 1/3）
      k = typeof k !== 'undefined' ? k : 1 / 3;
      // 计算选中效果分别在 x 轴、y 轴方向上的位移（未选中，则位移均为 0）
      let offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0;
      let offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0;
      // 计算高亮效果的放大比例（未高亮，则比例为 1）
      let hoverRate = isHovered ? 1.05 : 1;
      // 返回曲面参数方程
      return {
        u: {
            min: -Math.PI,
            max: Math.PI * 3,
            step: Math.PI / 32
        },
        v: {
            min: 0,
            max: Math.PI * 2,
            step: Math.PI / 20
        },
        x: function (u, v) {
            if (u < startRadian) {
                return offsetX + Math.cos(startRadian) * (1 + Math.cos(v) * k) * hoverRate;
            }
            if (u > endRadian) {
                return offsetX + Math.cos(endRadian) * (1 + Math.cos(v) * k) * hoverRate;
            }
            return offsetX + Math.cos(u) * (1 + Math.cos(v) * k) * hoverRate;
        },
        y: function (u, v) {
            if (u < startRadian) {
                return offsetY + Math.sin(startRadian) * (1 + Math.cos(v) * k) * hoverRate;
            }
            if (u > endRadian) {
                return offsetY + Math.sin(endRadian) * (1 + Math.cos(v) * k) * hoverRate;
            }
            return offsetY + Math.sin(u) * (1 + Math.cos(v) * k) * hoverRate;
        },
        z: function (u, v) {
            if (u < -Math.PI * 0.5) {
                return Math.sin(u);
            }
            if (u > Math.PI * 2.5) {
                return Math.sin(u) * h * .1;
            }
            return Math.sin(v) > 0 ? 1 * h * .1 : -1;
        }
      };
    }

    function fomatFloat(num, n) {
      var f = parseFloat(num);
      if (isNaN(f)) {
          return false;
      }
      f = Math.round(num * Math.pow(10, n)) / Math.pow(10, n);
      var s = f.toString();
      var rs = s.indexOf('.');

      //判定如果是整数，增加小数点再补0
      if (rs < 0) {
        rs = s.length;
        s += '.';
      }
      while (s.length <= rs + n) {
          s += '0';
      }
      return s;
    }

    //获取3d饼图的最高扇区的高度
    function getHeight3D(series, height) {
      series.sort((a, b) => {
          return (b.pieData.value - a.pieData.value);
      })
      return height * 25 / series[0].pieData.value;
    }

    // 生成模拟 3D 饼图的配置项
    function getPie3D(pieData, internalDiameterRatio) {
      //internalDiameterRatio:透明的空心占比
      let series = [];
      let sumValue = 0;
      let startValue = 0;
      let endValue = 0;

      let k = 1 - internalDiameterRatio;
      pieData.sort((a, b) => {
        return (b.value - a.value);
      });
      // 为每一个饼图数据，生成一个 series-surface 配置
      for (let i = 0; i < pieData.length; i++) {
        sumValue += pieData[i].value;
        let seriesItem = {
          name: typeof pieData[i].name === 'undefined' ? `series${i}` : pieData[i].name,
          type: 'surface',
          parametric: true,
          wireframe: {
              show: false
          },
          pieData: pieData[i],
          pieStatus: {
            selected: false,
            hovered: false,
            k: k
          },
          center: ['10%', '50%']
        };

        if (typeof pieData[i].itemStyle != 'undefined') {
          let itemStyle = {};
          typeof pieData[i].itemStyle.color != 'undefined' ? itemStyle.color = pieData[i].itemStyle.color : null;
          typeof pieData[i].itemStyle.opacity != 'undefined' ? itemStyle.opacity = pieData[i].itemStyle.opacity : null;
          seriesItem.itemStyle = itemStyle;
        }
        series.push(seriesItem);
      }

      // 使用上一次遍历时，计算出的数据和 sumValue，调用 getParametricEquation 函数，
      // 向每个 series-surface 传入不同的参数方程 series-surface.parametricEquation，也就是实现每一个扇形。
      legendData = [];
      legendBfb = [];
      for (let i = 0; i < series.length; i++) {
        endValue = startValue + series[i].pieData.value;
        series[i].pieData.startRatio = startValue / sumValue;
        series[i].pieData.endRatio = endValue / sumValue;
        series[i].parametricEquation = getParametricEquation(
          series[i].pieData.startRatio,
          series[i].pieData.endRatio,
          false,
          false,
          k,
          series[i].pieData.value    // 控制各模块高度一致100   控制各模块高度根据value改变 
        );
        startValue = endValue;
        const bfb = fomatFloat(series[i].pieData.value / sumValue, 4)
        legendData.push({
          name: series[i].name,
          value: bfb
        });
        legendBfb.push({
          name: series[i].name,
          value: bfb
        });
      }
      boxHeight = getHeight3D(series, 13);//通过传参设定3d饼/环的高度，26代表26px
      return series
    }

    let optionData = [
      {
        name: '在线仪器',
        value: equip.value,
        itemStyle: {
          color: '#2EAEFE',
        }
      },  
      {
        name: '异常仪器',
        value: unequip.value,
        itemStyle: {
        color: '#3B36AC'
      }
    }];
    const series = getPie3D(optionData, 0.59);
    //重新绘一个2D的饼图显示连接线及数据
    series.push({
      name: 'pie2d',
      type: 'pie',
      label: {
          opacity: 1,
          fontSize: 13,
          lineHeight: 20,
      },
      labelLine: {
          length: 10,
          length2: 20
      },
      startAngle: -20, //起始角度，支持范围[0, 360]。
      clockwise: false,//饼图的扇区是否是顺时针排布。上述这两项配置主要是为了对齐3d的样式
      radius: ['10%', '52%'],
      data: optionData,
      itemStyle: {
          opacity: 0
      }
    });
    optionData.forEach((item, index) => {
      item.label = {
        color: '#fff',
        show: true,
        formatter: '{b|{b}{c} \n}{c|{d}%}',
        rich: {
          b: {
            fontSize: 11,
            lineHeight: 16
          },
          c: {
            fontSize: 11,
          },
        }
      };
    })

    // 准备待返回的配置项，把准备好的 legendData、series 传入。
    return {
      legend: {
        data: legendData,
        bottom: 0,
        itemWidth: 6,
        textStyle: {
          color: '#fff',
        },
        show: true,
        icon: "circle",
      },
      xAxis3D: {
        min: -1,
        max: 1
      },
      yAxis3D: {
        min: -1,
        max: 1
      },
      zAxis3D: {
        min: -1,
        max: 1
      },
      grid3D: {
        show: false,
        boxHeight: boxHeight, //圆环的高度
        viewControl: { //3d效果可以放大、旋转等，请自己去查看官方配置
          alpha: 40, //角度
          distance: 240,//调整视角到主体的距离，类似调整zoom
          rotateSensitivity: 0, //设置为0无法旋转
          zoomSensitivity: 0, //设置为0无法缩放
          panSensitivity: 0, //设置为0无法平移
          autoRotate: false //自动旋转
        }
      },
      series: series
    };
  }
  const renderChart = () => {
    lineDom = document.getElementById("equipTotal");
    charts = echarts.init(lineDom);
    const option = init();
    option && charts.setOption(option);
  }

  onMounted(() => {
    getEquipData().then((res: any) => {
      console.log('仪器数据');
      console.log(res);
      equip.value = res.data[0].sj_out;
      unequip.value = res.data[0].out;
      renderChart();
    });
  })
</script>

<style lang="less" scoped>
  #equipTotal {
    width: 92%;
    height: 187px;
    margin: 0 auto;
  }
</style>